<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button @click="showAddCat()" type="primary">添加分类</el-button>
        </el-col>
      </el-row>
      <tree-table
        class="tree-table"
        index-text="#"
        border
        show-index
        :expand-type="false"
        :selection-type="false"
        :data="cateList"
        :columns="columns"
      >
        <template slot="isok" slot-scope="scope">
          <i
            style="color:lightgreen;"
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
          ></i>
          <i style="color:red;" class="el-icon-error" v-else></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level === 0" size="mini" type="primary">一级</el-tag>
          <el-tag v-else-if="scope.row.cat_level === 1" size="mini" type="success">二级</el-tag>
          <el-tag v-else size="mini" type="warning">三级</el-tag>
        </template>
        <template slot="opt">
          <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
        </template>
      </tree-table>
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
    <el-dialog @close="addCatDialogClose" title="添加分类" :visible.sync="addCatDialogVisible" width="50%">
      <el-form :model="addCatForm" :rules="addCatFormRules" ref="addCatFormRef" label-width="100px">
        <el-form-item label="分类名称：" prop="cat_name">
          <el-input v-model="addCatForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
          <el-cascader
            clearable
            v-model="selectedKey"
            :options="ParentCateList"
            :props='cascaderProps'
            @change="ParentCateChange"
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCatDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCat">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      cateList: [],
      ParentCateList: [],
      total: 0,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name",
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],
      addCatDialogVisible: false,
      addCatForm: {
        cat_pid: 0,
        cat_name: "",
        cat_level: 0,
      },
      addCatFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" },
        ],
      },
      cascaderProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children",
        checkStrictly:true,
      },
      selectedKey: [],
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo,
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类失败");
      }
      this.cateList = res.data.result;
      this.total = res.data.total;
    },
    handleSizeChange(new_size) {
      this.queryInfo.pagesize = new_size;
      this.getCateList();
    },
    handleCurrentChange(new_page) {
      this.queryInfo.pagenum = new_page;
      this.getCateList();
    },
    showAddCat() {
      this.getParentCateList();
      this.addCatDialogVisible = true;
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: {
          type: 2,
        },
      });
      if (res.meta.status !== 200) {
        this.$message.error("获取父级分类失败");
      } else {
        this.ParentCateList = res.data;
      }
    },
    ParentCateChange() {
      if(this.selectedKey.length > 0){
        this.addCatForm.cat_pid = this.selectedKey[this.selectedKey.length-1]
        this.addCatForm.cat_level = this.selectedKey.length
        return 
      }else{
        this.addCatForm.cat_pid = 0
        this.addCatForm.cat_level = 0
      }
    },
    addCat(){
      this.$refs.addCatFormRef.validate(async valid=>{
        if(!valid)return 
        const {data:res} = await this.$http.post('categories',this.addCatForm)
        if(res.meta.status !== 201) return this.$message.error("分类添加失败！")
        this.$message.success("添加分类成功！")
        this.addCatDialogVisible = false
        this.getCateList()
      })
    },
    addCatDialogClose(){
      this.$refs.addCatFormRef.resetFields()
      this.selectedKey = []
      this.addCatForm.cat_level=0
      this.addCatForm.cat_pid=0
    },
  },
};
</script>

<style lang="less" scoped>
.tree-table {
  margin-top: 15px;
}
</style>